SR55 on EJ22 hybrid
 

What is your opinion, would a SR55 work fine on a EJ22 hybrid?
As well is a newage STI topmount intercooler fine for this turbo?
Rpmlimit is 8k.

anyone?

What power are you aiming for? general opinion is that the newage sti intercooler is good up to and around 400bhp but then you are pushing the limits.
That said Andy F is running one at 450bhp but personally at 400bhp I would swich to a fmic.

Banny

That´s okay for me, I just want to have around 400 to 450bhp.
But a SR55 will add much lag I think.
Anyways I would be able to make more power with less boost...

Should I stick with the SR40?

You should get something else than APS. IMHO APS makes good products, except turbos.

SZ55 thick lines, SR55 thin lines
http://www.jlosee.com/images/STi/sz55vssr55.jpg

A journal bearing turbo, vs a ballbearing SR55, and the SZ55 makes much more power earlier, more midrange and the same topend. This is on the same dyno.

Is this on the same car?
The numbers seem to be quite low! :(

No, but very similar mods on equal cars, dynoed\tuned only days apart. And that is whp. So 375whp= 450bhp or so.

Oh allright, that´s not that much I thought too! :(

WHat turbo would be best for quick spool and power about 450bhp as well as useable with the newage STI TMIC?

MD321T no doubt!

Banny

what can I await with the STI TMIC still in place?

Andy F on his 2.5 is running the MD321T and making 450bhp with the sti tmic and over 500 lb/ft of torque.

banny

If I go after the printout upwards, I can await this from the SR55 too, isn´t it?

Probably close with a good tuner, but torque and a broad powerband is what makes a fast car! Peak bhp doesn`t mean ****.

Why spend so much on a turbo that gives you a laggy, slow spooling car, which doesn`t make more power than another faster spooling turbo with better response would?!

And 450 genuine bhp, is quite violent on a daily driver. And you would need to get very high duty on 800cc injectors to get close to 450bhp.

that big?? running 464bhp on 650cc injectors on mine.

Genuine BHP yes. An Ford RS500 is emptying 8 444cc injectors for 500bhp. A company here in Norway, with a dyno that reads actual bhp, made 310bhp and had 92% duty with 565cc injectors.

Thats 150bhp difference with a mere 100cc more. And everyone knows that you can`t make 150bhp with 100cc per injector on a 4cyl. So in short, you don`t have a genuine 464bhp.

The funny thing is JD runs methanol meaning the injectors have to flow a little more than if you are running just petrol.
I will be running 740cc injectors and aiming for 450bhp possibly more with methanol, so your logic is wrong or maybe the uk just has better tuners :p ;)

banny

jd5217: Care to explain about that setup? And 300whp and 464bhp is BS! you don`t loose 160bhp through the drivetrain. That is nearly 120kw of friction and heat! It might make 300whp, but real life bhp would be around 375 with normal drivetrain losses.

the drivetrain losses on this rolling road can be ignored due to the style of dyno this is.

webmaster can give more details on this, shaun where are you?

Numbers don`t lie. Tuning is a part of it, but if you calculate over 35% drivetrain loss, anything is possible of course.

And you will be having lower injector duty with meth, not higher. Meth makes up for some of the petrol.

but the meth is oxygenated so hence more fuel for the same bang, surely.

Legacy Turbo EJ22G,
Don't confuse flow rates of injectors at standard fuel pressure, with flow rates of injectors at increased fuel pressure. I maxed out 800cc injectors at around 500bhp at standard fuel pressure. Up the fuel pressure and they will flow more....... much more. I am now currently running 1150cc injectors, since my preferred tuner does not go with increased fuel pressures. Needless to say, there is more than one way to skin a cat. :)

Is JD running standard fuel pressure?

As regards to the MAHA rolling road, I think you need to do some research on how the MAHA set-up works before you state the flywheel figure is BS. Put it this way..... it's no more BS than any other dyno. ;)

This very same dyno is used by myself, with flywheel results comparable to a Dyno Dynamics rolling road as well.... much the muchness. MAHA's are designed to calculate flywheel figures. So this is the data that needs to be compared. JD5217 already has other readouts from two other different dyno's to substantiate this.

I have personally had 530bhp (repeatable) at the fly from the MAHA dyno discussed, with comparative figures from a Dyno Dynamics run and further backed up by 440bhp AT THE HUBS on a hub dyno (in fact the same manufacturer as the plot you have just put up). All seems reasonable to me and I admit I am starting to run out of dyno's to use and compare! :D

JD you have permission to feel smug now ;) :lol1:

Banny

thanks for the explanation on the Maha dyno.

thank you banny :smug:

fuel pressure on mine..............still running standard fuel pressure regulator..............just.

Okay please back to my questions! ;)

Is the SR55 realy that bad and slow spooling?

Yes as far as i've read.

Can´t believe this, as it´s a dual ballbearing turbo... :(
I have this turbo lying on my shelf, so that´s why I´m asking that much questions! ;)
The SR40 works quite well at the moment and it´s not tuned yet!
Makes boost from as low as 3.000rpm...
But this one is a bit smaller than the SR55 and I wonder about the TMIC as well...do not want to change to FMIC!

Unfortunately there is a whole lot more to good turbo design than just the core (blade design, both the exhaust and intake housing sizes and designs, just to name a few) which will all have a marked effect on spool and achievable power.

If I were you, I would sell of the SR55 (if it's new I am sure you can get a good price for it) and go with a tried and trusted design like the MD321T or similar. The MD321H is also a very good turbo for around 380 - 420 bhp and should make excellent torque on your EJ22 engine with minimal lag if you want to keep the TMIC.

I`m not confusing flow rates, but when 800cc is stated, and no fuel pressure, I have to assume that they actually flow 800cc.

Specific fuel useage (BSFC) and airflow is what tells the tale. Numbers don`t lie, dynos can and will, and tuners can make the dynos tell whatever they want.

As I stated earlier, almost maxed out 565cc injectors made 310bhp on a VF34 on one dyno. And an equal amount of fuel on another dyno shows "440bhp". Which one tells the truth?

500bhp is very possible on 800cc injectors at stock fuel pressure. You`re pushing it with the duty cycle though.

Actual bhp, and pub-bhp is two different things.

JD5217: Methanol is used as fuel. And AFAIK cars don`t run on pure oxygen yet. I think you have it mixed up with NAWS... ;) NOS oxygenates AFAIK.

I realise that meth is used as a fuel, why else would it be in my tank.

But from my knowledge, the methanol is more oxygenated hence more fuel mix (v Power & meth) is required.